BSkyB dominates the Best New Comedy category with Moone Boy competing against Hunderby, a period drama spoof on Sky Atlantic, and Alan Partridge: Welcome To The Places Of My Life, the return of Coogan's comic broadcaster.
David, a pupil at Carrigallen National School who was selected from an open-casting session, plays Martin Moone, an artistic 11-year-old whose chaotic daily life is a constant negotiation between school bullies, his sister's pranks and the pressures of being an altar boy.
The youngster has been nominated for Best Comedy Breakthrough Artist at the British Comedy Awards, which will be screened by Channel 4 next Wednesday.
The six-part Moone Boy, which features O'Dowd as Martin's imaginary 30-something friend and a cameo appearance from Steve Coogan, has also been nominated for Best New Comedy Programme.
David was unfazed by working in such distinguished company. "It sounded really cool," he said. "I just wanted to go for the fun of it. I was really shocked and excited when they called me for a second audition."
"Sky let us go out into the countryside to do open-casting sessions," O'Dowd said.
"We found this kid half an hour down the road from where I'm from, and he was perfect. He hasn't been in front of a camera before. He's just so natural and instinctive."